Question

A copper and a steel wire having same length and diameter are joined end to end when a force is applied at the end of the wire the net length of the wire increases by 1 cm the wires will be

Answer 1

1cm increased but diameter remains same

Answer 2

Here the stress will remain same and the value of strain will be different ....

stress is equals to force upon area and it is given that the same force is applied and the area of cross section is same for both the wire ...

strain depends upon the Young's modulus of the wire and elongations...

which will undoubtedly be different for these two wires cells they are of two different materials ..

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